Locking device for a photographic interchangeable lens



FIG. 1 is a front elevational view of a locking device for a photographic interchangeable lens embodying our new design;

FIG. 2 is a front plan view thereof;

FIG. 3 is a bottom and rear plan view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is an enlarged top and front perspective view thereof;

The photographic interchangeable lens shown in broken lines in the drawings is intended to illustrate the locking device in operative environmental relationship, and is not a part of the claimed design. 

The ornamental design for a locking device for a photographic interchangeable lens, as shown and described. 